Topologically Allowed Nonsixfold Vortices in a Sixfold Multiferroic Material: Observation and Classification

被引：21

作者：

Cheng, Shaobo ^{[1
,2
]}

Li, Jun ^{[3
]}

Han, Myung-Geun ^{[2
]}

Deng, Shiqing ^{[1
]}

Tan, Guotai ^{[4
]}

Zhang, Xixiang ^{[3
]}

Zhu, Jing ^{[1
]}

Zhu, Yimei ^{[2
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China

[2] Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA

[3] King Abdullah Univ Sci & Technol, Div Phys Sci & Engn, Thuwal 239955, Saudi Arabia

[4] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 14期

关键词：

VORTEX DOMAINS; STRAIN FIELDS; FERROELECTRICITY; CONDENSATION; DISPLACEMENT; DEFECTS; WALLS;

D O I：

10.1103/PhysRevLett.118.145501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report structural transformation of sixfold vortex domains into two-, four-, and eightfold vortices via a different type of topological defect in hexagonal manganites. Combining high-resolution electron microscopy and Landau-theory-based numerical simulations, we investigate the remarkable atomic arrangement and the intertwined relationship between the vortex structures and the topological defects. The roles of their displacement field, formation temperature, and nucleation sites are revealed. All conceivable vortices in the system are topologically classified using homotopy group theory, and their origins are identified.

引用

页数：6

共 43 条

[1] Direct Evidence for Cation Non-Stoichiometry and Cottrell Atmospheres Around Dislocation Cores in Functional Oxide Interfaces
Arredondo, Miryam
Ramasse, Quentin M.
Weyland, Matthew
Mahjoub, Reza
Vrejoiu, Ionela
Hesse, Dietrich
Browning, Nigel D.
Alexe, Mann
Munroe, Paul
Nagarajan, Valanoor
[J]. ADVANCED MATERIALS, 2010, 22 (22) : 2430 - +
[2] Artyukhin S, 2014, NAT MATER, V13, P42, DOI [10.1038/NMAT3786, 10.1038/nmat3786]
[3] Strain mapping accuracy improvement using super-resolution techniques
Barcena-Gonzalez, G.
Guerrero-Lebrero, M. P.
Guerrero, E.
Fernandez-Reyes, D.
Gonzalez, D.
Mayoral, A.
Utrilla, A. D.
Ulloa, J. M.
Galindo, P. L.
[J]. JOURNAL OF MICROSCOPY, 2016, 262 (01) : 50 - 58
[4] Self-organization, condensation, and annihilation of topological vortices and antivortices in a multiferroic
Chae, S. C.
Horibe, Y.
Jeong, D. Y.
Rodan, S.
Lee, N.
Cheong, S. -W.
[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2010, 107 (50) : 21366 - 21370
[5] Polarization Structures of Topological Domains in Multiferroic Hexagonal Manganites
Cheng, Shaobo
Zhao, Yonggang
Sun, Xuefeng
Zhu, Jing
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2014, 97 (11) : 3371 - 3373
[6] Choi T, 2010, NAT MATER, V9, P253, DOI [10.1038/NMAT2632, 10.1038/nmat2632]
[7] Bulk magnetoelectricity in the hexagonal manganites and ferrites
Das, Hena
Wysocki, Aleksander L.
Geng, Yanan
Wu, Weida
Fennie, Craig J.
[J]. NATURE COMMUNICATIONS, 2014, 5
[8] Measurement of strain fields in an edge dislocation
Dong, Z. S.
Zhao, C. W.
[J]. PHYSICA B-CONDENSED MATTER, 2010, 405 (01) : 171 - 174
[9] DZYALOSHKINSKII IE, 1977, JETP LETT+, V25, P98
[10] Ferroelectric transition in YMnO3 from first principles -: art. no. 100103
Fennie, CJ
Rabe, KM
[J]. PHYSICAL REVIEW B, 2005, 72 (10):

← 1 2 3 4 5 →